From: east coast, usa
I'd like to hear more about your mod.
I think it's pretty simplistic. First, remove all the Cruisers and Destroyers [except for the minor countries that only had one or two of these types and no capital ships]. Then create 'groups' by adding combat aspects of cruisers and destroyers to BB's and CC's, exception being the German Pocket Battleships which operate by themselves.
It could go a step further and combine these units into, for example, for the UK separate units comprising 'Force H' and 'Force W', etc. This type of change would then include multiple capital ships in one unit, and would greatly reduce the number of naval units, but might unbalance Germany. So I'm not keen on doing that.
Still in the thought process is Kirk's idea of reducing naval movement factors. I'm not too sure of that at this point. I'm also not an expert, by far, on naval warfare in games. In fact, I might just well be an idiot, but so far I like playing this much better than having all of those DD's and CC[L][A]'s to move around the board